Effects of key factors on load-carrying capacity of radial static air bearing

Based on the momentum conservation equation and conservation equation, the analysis model is established for a radial static bearing lubricated by the air in composite spindle. The finite element model of the radial static bearing is built by using the finite element software, and the simulation analysis is carried out. The effects of eccentricity, orifice diameter, supply pressure and rotational speed on the Load-carrying capacity are simulated and analyzed under different boundary conditions. The results show the Load-carrying capacity increase with the increase of the eccentricity and supply pressure. There is an optimal orifice diameter for the largest Load-carrying capacity under the invariable air membrane thickness. Due to the increase of dynamic pressure effect, the Load-carrying capacity increase with the increase of rotational speed. These results are helpful to designing the optimal radial static bearing.